Aromatic cyclotriphosphazenes

Details Aromatic cyclotriphosphazenes Aromatic cyclotriphosphazenes

1986-10-29

1988-05-31

Sutto, Anton H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

564 13, C07F 900

Patent

active

047482630

ABSTRACT:
4-Aminophenoxy cyclotriphosphazenes are reacted with maleic anhydride to produce maleamic acids which are converted to the maleimides. The maleimides are polymerized. By selection of starting materials (e.g. hexakis amino or trisaminophenoxy-trisphenoxy-cyclotriphosphazenes), selection of molar proportions of reactants, use of mixtures of anhydrides and use of dianhydrides as bridging groups a variety of maleimides and polymers are produced. The polymers have high limiting oxygen indices, high char yields and other useful heat and fire resistant properties making them useful as, for example, impregnants of fabrics.

REFERENCES:
patent: 3280222 (1966-10-01), Kober et al.

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